Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8178c4be2673b3034abbd2f7876d94093a5d412a5daa90a3fd7ff06fb3871c47' 
  AND token = 'nh3Ns5qpHWrQS/R3mA1cgAylhYqMiX1irGTJBl5bR6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}