Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80efedad795cc1585fe58db70783ad6a4991ded2dee01b54b27dd3cf5c32212c' 
  AND token = 'ehGkEeUBD3MYDEtKiWvuKSDndrn5romNze3cRg60bd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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