Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac2f1a496f4e5664f8956ef89ebbad06afb874b3a52f45c28445bbf7593311c5' 
  AND token = 'PKcYgkuC09KG+dhtrAaCeuENZK3iwsu/cHLMbWCo0p8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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