Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89e091840b3b591c7040cd84125131df2341e64172e253a9a789173768d55d27' 
  AND token = 'Wqc9Kn5KbU1sGB1TUSGSOqNSxL9nuFTYZwzfDAEVW+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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