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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd05218223e8955a88d23db6a0e9352aac0d2b5719bba693fb6a5e9a2825ddf56' 
  AND token = 'NTexGFKUUrZbe6xDjxLhx5KZgg8huL7O5FEBrtM3kts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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