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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cba7da5eda805777cdc4a4bfb42a6bcc36ae1d79ad0a7b38315b90d3bf027c16' 
  AND token = 'QbSGRDYbW6w4EX3iisicl6G8NeFdz/zntFG1m93GYU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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