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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e58901deb0b3d52eb3a03eab4fed2e2e7e0d1c06db938f073de743415156a90' 
  AND token = 'zteU/Wc3h/aPd7ZHvUURpDezs2gEd24jDy6Ee6DKiZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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