Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20d1cf9f936738f238d09014c833f103f7f2437585106badcc55b59fa8db3ad1' 
  AND token = 's8QsTbhx3bddNmfmK9lN1im+WX9azzOo8ePW3Ivk0Cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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