Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1363656f2bea3fd6fd8b05973994cf3da63497f74af62f461368874c9cb948f' 
  AND token = '5xgH2C3fN7JliCcLavEzRxN/0ziJ/XOZqz5yBbRmMkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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