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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acccdcecf78e501406dabc3bb19bac35eb56118461fe3b1c39de9e4803709435' 
  AND token = '2QFFz3nLG74Q5EoFU2arPutpBXNiL8FfbTM5uiSxGI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.07866

JSON explain

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