Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff94d89312005be8cea7ee551c888535cf15e86e19591e328a6ab5c49992fbc4' 
  AND token = 'LHauqLj+zmPbNJIMCPSys55ZEK1ymXanN6KZAuo6xqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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