Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04f484ca093167be0368a7f60fc60e152171daac1979a97b8bed147bdf0d395c' 
  AND token = '5DejSC+z9+bsrdDn/nNnAvL8BqN7TaFMjMzG+yjIcL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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