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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de12d06a9a83878ef7a83ed1a4901440c475c8671ea78c2074c497cd5b5ca8fa' 
  AND token = 'L+EGaacw6L6/ZkMyCbm+9EDF785ZXYhhEQZ9TgPj3Tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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