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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f22b910dc98c7966f2070228245fe5c16ded2ad1460c2f05f54cd6a6690918c9' 
  AND token = '111YJWx8m7l9Pt2h1mqyJaHwR6D9A/u6WThgFxdNZNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}