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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '033314e28889781b759ea7b7a921311ac7b98519c6c3d353bbca72c18d647c5f' 
  AND token = '2tXOv/1Q2fad0pD68InM3Zms9gAUZIouEPfb3uOqXWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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