SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e77443f7a7b196c9b77d57447fb3b69a9a00381338761bb3b0eebfd0957aa2f' 
  AND token = 'VDj2UgRQ/9pF96cR4K2VGeu/jvGOYYG1ShZhzFAn7rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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