Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b2455b95d4c0220684a8d384db72ad3a8c9518cd7cc3353f97de43b31f39abe' 
  AND token = 'mVC+SU8dfdfFBY5G3F8Vtv7uOb/rz7wTaAJfY1FjzGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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