Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd87b26df0178cc832ae78970fc4e66f1f5f8ca86e3ef393704c828dcd55e6d1' 
  AND token = 'YSudvpLgO3gbRasLTshN7Mzfnan9R6bFA/Lp2B0wui4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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