Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5479d7413459610f1da6cb412b67a332c10b26880d42dd24cf1934b50ce89a11' 
  AND token = 'E+9LTGn5OctyU7cM165pTTHSgituCrQEf3TubHKEzdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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