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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22360e809c8eaa41bdebb65b39475070fc177241b8c9bf977d728681e07f24a5' 
  AND token = 'bjExIcSejcwflParALvuN2BNmE11g0IH6E59lBF7y5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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