Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c9b2fac251906ae332a06559569aeb4d1c977fee32c48787f37102c81b9333' 
  AND token = 'CLyNyu72PlajBBOXMDmdgX5WcvmYD2D05nxGAWWCcpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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