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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '066ac33a9300b3967c9c6fc8969fde35b26e6177af63851dc6f0b39916771ee2' 
  AND token = 'ru+Gqtwpuh9f9oPzaX/F9gaq5K4Yp4Keson0r8aNm/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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