Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f27803a095e629201eb3bda60a9f8546fd6ee70d48d09e6bfc6513930f95dacd' 
  AND token = 'FSaR7ZbjIEBTwlEy3JwGAAc+rnyxHNTBCDnotSqvraw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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