Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0315d4c22eb3fb1f08301a46b865da0f83dd81f7f3937a7046be56c9dfe3d864' 
  AND token = '3HiMC9+JxaJ8NmL9ZXpBsa7ClgEzZ96903N97ZyrFu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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