Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf888a440dc17b47fab8142df9ac482d84a0a6e9c0258c7b3e8f4f4192f77127' 
  AND token = 'Rv2e7ORP1QTHXeNGWVMc8WlHUbDe089VRNBUZ1V1kmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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