Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b80f6fde8ff7148131aa3d46473fabd75eada1c6740294b445a4da6ea1f6739d' 
  AND token = '40ekboOAQErqgGcpdXHROk66PdvMlF79xWnqaPGqd0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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