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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee71543d3c1b3170fb688342acbe44ea83f470bba4a6dc137964ca0dd52d6602' 
  AND token = 'onxNGME73mkfqeOX27DXk4oJ8Bipbxz2e/cYXHwKpXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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