Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b5b612944da41bb1028c78aa86595f300a864e23c2dc5fb12c3da6b98c135b9' 
  AND token = '++okyd3xKLooW9SIq3s0NwK7s3G2COqbnNx7/pUWgXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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