Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1550691db89d3cbdb2cbe27b7399e4dea68b32c94d518964a9f6d1d24c719993' 
  AND token = 'Tp+mava97ibju03B5NlwXz9Dj4H3oKuJj+NDivNp5V8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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