Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'facbed90a6b1ab5d47a4f2acdc9af47fb2a1d56623f4b07a56c61b809197f1b0' 
  AND token = '+89/aBTDg0oExEAe0a9p69XCp7IMAyrkK+gFfoxQ6rM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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