Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8345a96d355153676078d13cc665d4ec8db8ddd8515032371f3907057f8aa6ab' 
  AND token = '6PChXuepOjiq4Q8q0bSkauwWkHn00IgIgDClk3K3BH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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