Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c71dbc67e18341f0bbc2f8c04e255795a678e1bc2bb96c31bf054a22d46ab471' 
  AND token = '9Ee5gkoUXmPju+isq9z2H+1g0vSEt+putjH+qPfUin8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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