Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31a7653e1dbdeea7e460195ff4bb5c5fc5316f7d4f0191011fbf8db4fc737f70' 
  AND token = 'A0xLJuvPwonl61noaakqbHxeEch0X2o4vYzozLUCISo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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