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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '61a1b5da10d082c7902db909707c24a71789ae0d660c816902c32fcf76783d1d' 
  AND token = '1wWx07ebH++1yBBo4fUPeZRsDi84UpQO8Huwo/RKZWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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