Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18f04cdc9e46edf13c39586526d4b9c5cd1baf6b50becf64f90de252164c7155' 
  AND token = 'nQcJkAOWa7Osinjn9Zq760H61kXXXci0pg82XYwrOFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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