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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b5badea5e2d2a965d4efb63db8014adf4f5b20ca2faf24c58f13bc3048c2824' 
  AND token = 'OlxwEBLae8WE7K7DirL11p/lSgmWtBaRHFXYJPq6uaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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