Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b81a346794a3a33465dfdef3ead1ebcbf5cf6a57785f3eb335fa8a37f950882e' 
  AND token = 'C54RGivcpK+1q2P53p8onFaFPLwVvvXIoNhA7z0yJ8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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