Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d72fda7ab825c935bf5218da4514d4a4d1a8c67e712636f204ef7796e2ea45b' 
  AND token = 'nEBBmKe2GXKP5Fn0hujwvb87aiEiT7sMN1AbUxlyTjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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