Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff3bd6d04ea0e44c0a570cfbae84a4415ef762ccccac59b2d800fc4dc5e7571e' 
  AND token = 'J3+fLVkdJn0beGIOJjLratpDgFQnu0yE+Q5AJh7/Xtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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