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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eeab812a5a6d6e665b8926054ffa86dca4412f6dbc81f5b488b887de7290162d' 
  AND token = 'uiDJww/T65OKgDGs2t4TPPxvyDFwUjr+JbW4C2erCX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00112

JSON explain

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