Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8449d32a8caa586ab6a62f0c263ba2aba4416af5d94151c35b12e5f5d5c00294' 
  AND token = 'Gwl803L47TNXiSJAM1Uo3PPvR4NkZOUC91vX+Yqco50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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