Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b8cc691c063989dcdc1607b876c34e231a474e6f5b5c261c96f164fcefd8d5f' 
  AND token = '7Wu5avBmalvFgEC063cJNhKLbv6eA1g8wwIoUhBH5NM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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