Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb7f1beb6df41c334e548be3205bbb0e734f7b6ee6c990a8c7c14758cc3ca028' 
  AND token = '7URUlpVML0IRqtMu+MtVhRdZwXHMspwPJhYZzkombSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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