Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a57dd0b86a158bc3b61962880fc84ef892fcc05d2e88764ab46f5adb090ebdb5' 
  AND token = 'W0eUItPlwZoSSOJ256F/Ve9khiv3jcQyFRcwQUX0Vpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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