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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d7b5e4c68962c6d0831dc198b700b842326fcc02afa4c56f6ec83e2302fc530' 
  AND token = 'CIM78Y5qt0W/GUJjVIG62S/htUMOhihqMOsmPSr8EpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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