Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5d8910942c8828339ef463c90861cefec8e450975a8d795ca3e7f48e2d37b4a' 
  AND token = 'F22tR/f9rp7APHuebsRgqNaL+hSiv5p8mMO/L2BfTxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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