Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf594cd6ce5c2cd6f1c716e428360f2f6be829d6a0f9410243a7ec424b8f06b8' 
  AND token = 'ku6IY3AoXSotjB1G6AtExYsUXv611MFnRmPY+3T3Sqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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