Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3f1e50847ff26eebfba6978a133890ee589d83b1b26d532623c659d24cfe00f' 
  AND token = 'LKfzGLgkwbPEfwjT0Cc1qhHtygJV+hftyBcq3A0V6zc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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