Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a5b3bc4a734015e9d1c10cfd169f800934399ca19eb286fa65dc19485371653' 
  AND token = 'L5XDIc1q+Dqf3rEJTYZn1dDs+8avhKAga+yF6x1Uc2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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