Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e76de3b2ca74c227ca9839e9d02527ca27f1a09819cde7866920e8a902a2b8b9' 
  AND token = 'y0oUHOPFD1Oonvhs87F8uXXvSmuwY92rQRz+iDJF18w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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