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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8eb6a1e9a092ad350eb2e0da1c830bc88bfdcd70828b8b6dd65ea7cf3129dbe' 
  AND token = 'CbmgKFjliR6kHEa/hV2TfNJAWK5XVNlPXCv/V6ecilk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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