Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5c21b273c5c340d9bba3b7bad33c5f03512f22686223db3425ac1a182bed502' 
  AND token = '1KFZ6vMMV30QvRQPPn6zRV0NAnG7/r4GwkQrS9awsn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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