Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82efb6afde395b6bd9007503a96142b531e3105dd3b0ef32456ffc2b9c59b71b' 
  AND token = 'u3PNCwfGViI3+r24f+/MhskwRNS3a/9biw2NfCsjSrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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