SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ecfe6683ef5817cef3edd29380158a2b63a307939456be9dbca2315c82c9a25' 
  AND token = 'ef3QgcqtghobDCwmGPThlkKj2zGdv+JVLBobRMkI+k4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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