Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b1659e0828483f63ae6ca23fd19f5c171cf74bb0f231028b75a84e1a280fd09' 
  AND token = 'XUmabP2ha1/sp7PRH5j38exzaZyGUhm5jtmT7k8d0Z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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