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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '143af7ae0d08e0d5b3d2e3f5722fbe056522feedb6d007bf28d3cface97d3bd8' 
  AND token = 'gO4RI86CAObAYB/jRYNjT+KDoOaGTB8EbTV1B9AWnAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}