Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc30a64557897aacf382c982aa53d907cb1b802922884cbe8aee25d70c44517a' 
  AND token = '5Xp5PdXDRkjSkvIyQ4JrtlgXIVmCUPFWpng1mX5wtz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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