Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c59d214c5450a29ec977a93fda2bf10f9de3330f43dd149f91547a15cd0ca80a' 
  AND token = 'JaqYfEcMwhbku9EB4pgKVTzEsHhGx4NhjGP1BX44a0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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