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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd62b24d64eca6c7ec3f8b4e93a82c5591d7b749fa09e2c6fcff7a43c2de9b929' 
  AND token = 'tkPVmvG2WsQIAdc8e0RXtPnEt6FRNi2Jfs05B5mOHBY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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