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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '072af098a6cdd8eaf49890f921ef4c2ff76f21907eeb3e17237cb59468fdc3b5' 
  AND token = 'W2x5OG2krSuM5lRdPHoqLzL3UN1Eh1isGkjNTBuW7Ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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