Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd4d4f0180fecd0560888ab695f6b07b9547ea675f20dd46bf964ba2c15a9cd5' 
  AND token = 'fMHUMf5FO/061m54JkAP6tiBJaqSkQGuLjZEv4y6rx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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