Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1959b70b1ec8a4fabd7f9f51ce48fcddb31dd748a0b17100750a438dd6c8ea91' 
  AND token = 'uxBW47GHeDR/LjtOzZxsbOK7R8hZL14MwMXWuoPJ/Dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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