Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de9c9a8883e36220d4a69bf15bdb3803e6cd77d8484ca163b245afa3a36f753a' 
  AND token = 'kIkpjB0JBCuQh9sZTvsO60IypuSHToiXF0Fxx7QErbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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