Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c48ffe69c1b11af5dab5a75f476c98b0bc87d37bd44258bcbbd0c4ba85d9b8e' 
  AND token = 'UR3AQIL4YhrAjIKYczLagtoEwbmY1N9OboX9qhOoWI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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