Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5985824f08b15d00261ec18ea3f529685183d32f0117d138eea66feceaefec4' 
  AND token = 'F605lyXYEvtAFI6KUDs5twi6fGNX3gd5YhHXsoS0ADM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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