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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60ad26237834fef57573aaf74d5249a08e57e545c3593a42480dd3a12008bccb' 
  AND token = 'KtRRQ9mGO7TRdYuBZrE2KFouPkmXD072HvaFd1Pdf0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00086

JSON explain

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