Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e7e01918eb56e3e42e18398c4be6a6fdf4c8bc29be27f86e944a1fb6fbf0aa8' 
  AND token = 'PzsJD1Mf0W6iFNdqRXo1qTypFoU73T0/aaNtQmSL/ak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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