Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5570a9619ea02264216d41a08a0ea5abe0c875e5f345724172ba8ea15729c4ad' 
  AND token = 'BZgmG2C8q1BjzYk2z36a4g+wF9Pe+R//DNiWRkAFXAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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