Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '089b64f76b4526bde939d923fb857f4ee4785243a194bdd5752f2f010da403b9' 
  AND token = 'XW+495nWPi4El/ikpIcb/mJgjAaYjvYqiVI3byhxcl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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