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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65e5fbcddca218d2cf4726056fd479194a23b39250d0846c6caa048d9f50394d' 
  AND token = 'sWLkJ13dYhquifMHuT+DAGg2X8k6RC7lWfOgangl5rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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