Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98edcf1bc57557dea223ac0651b2cce4825506d24f85ebadafca0dea65263b8a' 
  AND token = 'C3EskzifoDBJFih0VPewp/n8TizwqTGRwZ+BR3/NU+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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